xsk: i40e: get rid of useless struct xdp_umem_props

This commit gets rid of the structure xdp_umem_props. It was there to
be able to break a dependency at one point, but this is no longer
needed. The values in the struct are instead stored directly in the
xdp_umem structure. This simplifies the xsk code as well as af_xdp
zero-copy drivers and as a bonus gets rid of one internal header file.

The i40e driver is also adapted to the new interface in this commit.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

5 files changed, 18 insertions, 28 deletions

diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index d179732617dc..b3b632c5aeae 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -312,8 +312,8 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
 
 	umem->pid = get_task_pid(current, PIDTYPE_PID);
 	umem->address = (unsigned long)addr;
-	umem->props.chunk_mask = ~((u64)chunk_size - 1);
-	umem->props.size = size;
+	umem->chunk_mask = ~((u64)chunk_size - 1);
+	umem->size = size;
 	umem->headroom = headroom;
 	umem->chunk_size_nohr = chunk_size - headroom;
 	umem->npgs = size / PAGE_SIZE;
diff --git a/net/xdp/xdp_umem_props.h b/net/xdp/xdp_umem_props.h
deleted file mode 100644
index 40eab10dfc49..000000000000
--- a/net/xdp/xdp_umem_props.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* XDP user-space packet buffer
- * Copyright(c) 2018 Intel Corporation.
- */
-
-#ifndef XDP_UMEM_PROPS_H_
-#define XDP_UMEM_PROPS_H_
-
-struct xdp_umem_props {
-	u64 chunk_mask;
-	u64 size;
-};
-
-#endif /* XDP_UMEM_PROPS_H_ */
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 569048e299df..5a432dfee4ee 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -470,8 +470,10 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 		goto out_unlock;
 	} else {
 		/* This xsk has its own umem. */
-		xskq_set_umem(xs->umem->fq, &xs->umem->props);
-		xskq_set_umem(xs->umem->cq, &xs->umem->props);
+		xskq_set_umem(xs->umem->fq, xs->umem->size,
+			      xs->umem->chunk_mask);
+		xskq_set_umem(xs->umem->cq, xs->umem->size,
+			      xs->umem->chunk_mask);
 
 		err = xdp_umem_assign_dev(xs->umem, dev, qid, flags);
 		if (err)
@@ -481,8 +483,8 @@ static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
 	xs->dev = dev;
 	xs->zc = xs->umem->zc;
 	xs->queue_id = qid;
-	xskq_set_umem(xs->rx, &xs->umem->props);
-	xskq_set_umem(xs->tx, &xs->umem->props);
+	xskq_set_umem(xs->rx, xs->umem->size, xs->umem->chunk_mask);
+	xskq_set_umem(xs->tx, xs->umem->size, xs->umem->chunk_mask);
 	xdp_add_sk_umem(xs->umem, xs);
 
 out_unlock:
diff --git a/net/xdp/xsk_queue.c b/net/xdp/xsk_queue.c
index 6c32e92e98fc..2dc1384d9f27 100644
--- a/net/xdp/xsk_queue.c
+++ b/net/xdp/xsk_queue.c
@@ -7,12 +7,13 @@
 
 #include "xsk_queue.h"
 
-void xskq_set_umem(struct xsk_queue *q, struct xdp_umem_props *umem_props)
+void xskq_set_umem(struct xsk_queue *q, u64 size, u64 chunk_mask)
 {
 	if (!q)
 		return;
 
-	q->umem_props = *umem_props;
+	q->size = size;
+	q->chunk_mask = chunk_mask;
 }
 
 static u32 xskq_umem_get_ring_size(struct xsk_queue *q)
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index 8a64b150be54..82252cccb4e0 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -31,7 +31,8 @@ struct xdp_umem_ring {
 };
 
 struct xsk_queue {
-	struct xdp_umem_props umem_props;
+	u64 chunk_mask;
+	u64 size;
 	u32 ring_mask;
 	u32 nentries;
 	u32 prod_head;
@@ -78,7 +79,7 @@ static inline u32 xskq_nb_free(struct xsk_queue *q, u32 producer, u32 dcnt)
 
 static inline bool xskq_is_valid_addr(struct xsk_queue *q, u64 addr)
 {
-	if (addr >= q->umem_props.size) {
+	if (addr >= q->size) {
 		q->invalid_descs++;
 		return false;
 	}
@@ -92,7 +93,7 @@ static inline u64 *xskq_validate_addr(struct xsk_queue *q, u64 *addr)
 		struct xdp_umem_ring *ring = (struct xdp_umem_ring *)q->ring;
 		unsigned int idx = q->cons_tail & q->ring_mask;
 
-		*addr = READ_ONCE(ring->desc[idx]) & q->umem_props.chunk_mask;
+		*addr = READ_ONCE(ring->desc[idx]) & q->chunk_mask;
 		if (xskq_is_valid_addr(q, *addr))
 			return addr;
 
@@ -173,8 +174,8 @@ static inline bool xskq_is_valid_desc(struct xsk_queue *q, struct xdp_desc *d)
 	if (!xskq_is_valid_addr(q, d->addr))
 		return false;
 
-	if (((d->addr + d->len) & q->umem_props.chunk_mask) !=
-	    (d->addr & q->umem_props.chunk_mask)) {
+	if (((d->addr + d->len) & q->chunk_mask) !=
+	    (d->addr & q->chunk_mask)) {
 		q->invalid_descs++;
 		return false;
 	}
@@ -253,7 +254,7 @@ static inline bool xskq_empty_desc(struct xsk_queue *q)
 	return xskq_nb_free(q, q->prod_tail, q->nentries) == q->nentries;
 }
 
-void xskq_set_umem(struct xsk_queue *q, struct xdp_umem_props *umem_props);
+void xskq_set_umem(struct xsk_queue *q, u64 size, u64 chunk_mask);
 struct xsk_queue *xskq_create(u32 nentries, bool umem_queue);
 void xskq_destroy(struct xsk_queue *q_ops);